Possible To Delay Creating A File
Sep 26, 2014It is possible to delay the creation of a file until I know I am writing to it.
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Delay Using Key Bindings
Jan 2, 2014I got Key Bindings for a game I'm working on. They're supposed to move objects when keys are pressed.
(currently, each println(..) represents actual code to move things on the screen, will be added later).
The printing in the console works, but with delays. The words "left", "right", etc. appear with a delay in the console, sometimes half a second delay, sometimes a few seconds delay.
There is no delay at all sometimes, but when a lot of keys are pressed one after the other, there's a delay of several seconds, and only then the words suddenly appear in the console (like the computer had too much to handle at the same time).
When I did the same Key Bindings in a different project without all the game logic, only pressing buttons that print words in the console - it worked perfectly without delay.
So I suspect the problem is something with the game code, or the way I used Key Bindings inside the game code.
I tried putting the Key Bindings code in the thread that contains the game-loop (before the game-loop), and in the constructor. Same problem.
Here is the relevant code of the Board class (extending JPanel), the main JPanel of the game which displays the graphics and manipulates objects.
Java Code:
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Board extends JPanel implements Runnable {
Tank tank1,tank2;
boolean[] keysPressed1,keysPressed2;
[Code] ....
As I said, I suspect the program demands too much of the computer, so pressing a lot of keys one after the other, freezes the program for several seconds, and then suddenly prints the words on the console.
How To Add Interactive Time Delay In Java
Nov 16, 2014I'm trying to write a program the simulates the time delay of an elevator door and I want to know how I can add an interactive time in delay in Java.
I know that this is how you delay a Java program:
try {
Thread.sleep(60000);
}
catch(InterruptedException ex) {
}
But how can I make it so that the user can make the timer last longer or end faster through user input.
Timer Conversion On JApplet - Implement 6 Seconds Delay Before Every Loop
Jul 7, 2014So I'm trying to make an applet and I found that Thread.sleep() to simply delay is a bad idea.
I'm not sure how to use the Timer class to implement a same version of sleep() to delay 6 seconds. I am trying to do this in a for loop to delay before every loop. How can I implement this?
This code is after the init() method. For simplicity I didn't include. Assuming I did:
Timer t = new Timer(6000, null);
public void actionPerformed(ActionEvent e) {
try {
URL rsUrl = new URL("http://rscript.org/lookup.php?type=namecheck&name=" + n1);
BufferedReader br = new BufferedReader(new InputStreamReader(rsUrl.openStream()));
for (count = 0; count < maxCount; count++) {
[Code] ....
Read Text File Into Object Array And Creating Random Access File
Dec 8, 2014I am working on a project that requires me to build a database with random access file, representing products, the base product contains a name (about 30 characters), a price (double), and a quantity (integer). I have worked on this project for probably 15+ hours and have tried so many things and feel like I've barley made any progress...
The part i am really struggling with is taking the data from the text file and creating an object array with it using the product class. Once ive accomplished that, i have to use that data to create a random access file with the data.
Here is the base Product class that must be used to create the objects for the array.
public class Product
{
public String pName;
public String stringName;
public double price;
public int quanity;
[Code] .....
And then here is the data from the text file that i must extract to use to create product objects.
Dill Seed,938,34
Mustard Seed,100,64
Coriander Powder,924,18
Turmeric,836,80
Cinnamon (Ground Korintje),951,10
Cinnamon (Ground) Xtra Hi Oil (2x),614,31
Cinnamon (Ground) High Oil (1X),682,19
These continue for about 40-50 entries, they are not separated by a blank line though i had to add those so it would display correctly, each entry is on its own line with name separated with spaces, then price after a comma, then quantity after the second comma.....
Reading Text File Into Object Array And Creating Random Access File?
Dec 8, 2014I am working on a project that requires me to build a database with random access file, representing products, the base product contains a name (about 30 characters), a price (double), and a quantity (integer). I have worked on this project for probably 15+ hours and have tried so many things and feel like I've barley made any progress...
The part i am really struggling with is taking the data from the text file and creating an object array with it using the product class. Once ive accomplished that, i have to use that data to create a random access file with the data.
Here is the base Product class that must be used to create the objects for the array.
public class Product
{
public String pName;
public String stringName;
public double price;
public int quanity;
//Constructor
public Product( String pName, double price, int quanity )
[code]....
and then here is the data from the text file that i must extract to use to create product objects.
Dill Seed,938,34
Mustard Seed,100,64
Coriander Powder,924,18
Turmeric,836,80
Cinnamon (Ground Korintje),951,10
Cinnamon (Ground) Xtra Hi Oil (2x),614,31
Cinnamon (Ground) High Oil (1X),682,19
these continue for about 40-50 entries, they are not separated by a blank line though i had to add those so it would display correctly, each entry is on its own line with name separated with spaces, then price after a comma, then quanity after the second comma.....
Creating A System That Will Ask User To Create A File That Will Store To Text File
Mar 9, 2015I am new to java and I am creating a system that will ask the user to create a file that will store to a text file, Once the user created the file I have a class that will let the user input the subject name that has been created, However, I keep on getting this java.util.nosuchelementexception.Here's my code:
public void display_by_name()
{
String id, name,total;
String key[]=new String[30];
String value[]=new String[30];
int i=0;
[code]....
Creating Inventory File As Random Access File
Oct 26, 2014I need to write a program that will create an inventory file as a random access file. The problem that I am having is that among the things I need to add to the random access file is a "car name". Since random access files are byte based I don't know how I could possibly write and then read a string value.
View Replies View RelatedCreating A Package File
Aug 14, 2014Though have been playing around with my ebook but finding it difficult to get along with the topic PACKAGE&INTERFACES, I find it challenging to write a package file despite the book I currently studying and online tutorial.. so I want a more explanatory format to comprehend the piece cos without knowing it.
View Replies View RelatedOpenCSV When Creating JAR File
Mar 1, 2014I'm having a problem with using the openCSV library when I create a JAR file. I'm currently using BlueJ to run my code. When I compile my program in there, I have no problems whatsoever and it runs great, yet when I create my program into a JAR file, my application doesn't work.
I would think that my problem is either stemming from faulty exception handling, although I don't understand why an input would work in the BlueJ environment, but not when using the JAR file. Or, perhaps the openCSV library isn't in a correct class path(I don't know if this is correct terminology).
Creating File Directory
May 12, 2014I am working on a java logic game and I want it to be able to work on other people's Mac's, so I tried to figure out how to make it create a folder in which it can create files. The file creating is going fine however the folder never seems to create.Here is the code I attempted to use:
File logicFile = new File("/Library/Application Support/LogicGameSupport");
if(!logicFile.exists()){
if(logicFile.mkdir()){
System.out.println("Directory success");
}else{
System.out.println("Directory failed");
}
}
Creating XML File In Java
Jul 30, 2014I'm getting a DOMException, "HIERARCHY_REQUEST_ERR". I know that the problem is from the following code towards the bottom in my function, but I don't know how to deal with it. When I get rid of doc.appendChild(staff);, I get rid of the problem, but it obviously doesn't add the new entry to my root element.
Element staff = doc.createElement("Staff");
doc.appendChild(staff);
import java.io.File;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Transformer;
[Code] .....
Creating A File With Eclipse
Apr 13, 2014import java.io.*;
public class ReadNumbers
{
void input()
{
String File_name = "num.txt";
File numbers = new File(File_name);
[code]....
I am using eclipse and I went to file, add new file and named it num.txt:shot.png like show in the picture.
Creating A Jar File Using Command Prompt
Mar 5, 2014I currently finding a way how can i package a required/dependency JAR with my runnable JAR only using a command prompt like :
how the ECLIPSE IDE export RUNNABLE JAR
I am running on a linux environment, is there a way to do this.
I can only make Runnable Jar without the required JAR by using this command
jar cvfm Test.jar manifest.txt package/*.class
I/O / Streams :: Creating Hidden File
Jul 30, 2006I want to create hidden files, some sample code for doing this.
View Replies View RelatedCreating / Editing And Checking A File
Apr 7, 2015I need to check an existence of a file if it is already created or not but the problem is on my code I obviously making the file first before I am able to check if it exist or not.
File createFile = new File ("//path/name.txt");
I've read somewhere that that line should not make a file without the createFile.createNewFile(); but when I tested it and on my program, my program was creating the file even without the .createNewFile() method with that said. I'm confused on how would I be able to check an existence of a file without of course having it pre-created. here is the partial code:
File newFile = new File ("C:/Documents and Settings/Admin/Desktop/Keys.txt");
BufferedWriter write = new BufferedWriter (new FileWriter (newFile));
BufferedReader read = new BufferedReader (new FileReader (newFile));
if (newFile.exist())
{
System.out.print("File is existing");
}
Creating A Text File And Writing To It
Jul 19, 2014There are several ways in Java to create a text file and write to it. But which is the most effective way among them? Any example with code?
View Replies View RelatedCreating A Text File With Program Output
Sep 21, 2014I'm trying to copy my program output to a text file and still have it be displayed in the console.
View Replies View RelatedCreating File Or Folder But Using User Input For Name
Nov 14, 2014File dir = new File("file"); //creates folder named file
File dir1 = new File("file.txt"); //creates file
But I want to take in a file name from user e.g.
BufferedReader br = new BufferedReader(is);
String filename = br.readLine( );
File dir = new File(filename + ".txt");
its expecting a string literal is there a way round it to take a string???
Creating New Properties File Appending If It Exists
Feb 4, 2015I'm currently working on a java project simply to learn java. So far, it creates a window and makes a properties file, or appends data to it if it already exists. The problem is that I'm not quite sure how to check if the file already exists to append data to it. I'm currently using a boolean (configCreated) that appends data when true, and creates a file when false. The problem is that this boolean is always false since it's at the beginning.
Java Code:
package Setup;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Properties;
[code]...
Creating TXT File - Program Keeps Printing Exception Error
Apr 10, 2014I'm trying to have the program create a .txt file for me but it is not working properly. It just keeps printing the exception error "The file could not be found" and exits the program.
// This program asks the user for input for a name, phone number and notes up to 200 entries.
// It stores every contact in a file. Type 'h' for help while running this program.
import java.util.Scanner;
import java.io.*;
public class Phonebook {
static Entry[] entryList = new Entry[200];
static int numEntries;
public static void main(String[] args) {
[Code] ....
After running the code, I go into my workspace folder and I see that the file was created. What to do because running the program will always print "could not find the file".
Creating WordCounter Class With A Constructor That Takes File Name As Parameter
Mar 4, 2014Instructions
Create a WordCounter class with a constructor that takes a file name as a parameter
The class should have two fields: one for the file name and one for a HashMap to store word count information
The constructor should call a private method, countWords, that reads in the file and counts the word frequencies
The class should contain a get method for each field, as well as a print method that prints out the map in the following format:word:frequency
When printing, the map should be sorted by either the word order or frequency (Hint: see Collections.sort)
You should include the sample text file on Blackboard. This is what i got so far
Java Code:
import java.io.File;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.Scanner;
public class WordCounter
[Code] ....
JSF :: Null Pointer Exception While Creating File From Resources In Managed Bean Class
Feb 7, 2014i want to list files from resources folder like this:
@ManagedBean
public class galley implements Serializable {
private List<String> list;
@PostConstruct
public void init() {
list = new ArrayList<String>();
[Code] ....
but it give me a null pointer exception on fList .... The directory of resources is :
How is this caused and how can I solve it?
When Deleting Data From File / Temp File Won't Rename Back To Original File
Apr 23, 2015I am trying to remove a line based on user input. myFile.txt looks like:
Matt
Brian
John
However when I enter "Brian" (to remove this line), It is deleted on the temp file (myTempFile.txt), but not renamed back to the original file (myFile).
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Scanner;
[code]....
Best Way Of Creating Forms
Jun 8, 2014Im creating a program that has about 20 different input forms. Fairly standard forms but what i need to know whats the easiest way of creating forms. Is there some way of using templates or some plugin to quickly generate forms.
View Replies View RelatedCreating A 4x4 Gird
Feb 6, 2015I am having trouble developing a 4x4 grid that has the letters A-Z and a-z and the corresponding ASCII numbers for each letter. I have created the code to retrieve these letters and their corresponding ASCII numbers, I only am having trouble with creating the grid and displaying these numbers and letters in their separate 4x4 grids: one grid for (a-z), one grid for (A-Z), one grid for (ASCII# a-z), one grid for (ASCII# A-Z).
Java Code: // Constants Declaration Section
//*******************************
public static void main(String[] args)
{
// Variables Declaration Section
//******************************
[code]...